| Mathbox for Thierry Arnoux |
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| Mirrors > Home > MPE Home > Th. List > Mathboxes > fzto1st1 | Structured version Visualization version GIF version | ||
| Description: Special case where the permutation defined in psgnfzto1st 33205 is the identity. (Contributed by Thierry Arnoux, 21-Aug-2020.) |
| Ref | Expression |
|---|---|
| psgnfzto1st.d | ⊢ 𝐷 = (1...𝑁) |
| psgnfzto1st.p | ⊢ 𝑃 = (𝑖 ∈ 𝐷 ↦ if(𝑖 = 1, 𝐼, if(𝑖 ≤ 𝐼, (𝑖 − 1), 𝑖))) |
| Ref | Expression |
|---|---|
| fzto1st1 | ⊢ (𝐼 = 1 → 𝑃 = ( I ↾ 𝐷)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | simpll 767 | . . . . 5 ⊢ (((𝐼 = 1 ∧ 𝑖 ∈ 𝐷) ∧ 𝑖 = 1) → 𝐼 = 1) | |
| 2 | simpr 484 | . . . . 5 ⊢ (((𝐼 = 1 ∧ 𝑖 ∈ 𝐷) ∧ 𝑖 = 1) → 𝑖 = 1) | |
| 3 | 1, 2 | eqtr4d 2775 | . . . 4 ⊢ (((𝐼 = 1 ∧ 𝑖 ∈ 𝐷) ∧ 𝑖 = 1) → 𝐼 = 𝑖) |
| 4 | simpr 484 | . . . . . . . 8 ⊢ ((((𝐼 = 1 ∧ 𝑖 ∈ 𝐷) ∧ ¬ 𝑖 = 1) ∧ 𝑖 ≤ 𝐼) → 𝑖 ≤ 𝐼) | |
| 5 | simplll 775 | . . . . . . . 8 ⊢ ((((𝐼 = 1 ∧ 𝑖 ∈ 𝐷) ∧ ¬ 𝑖 = 1) ∧ 𝑖 ≤ 𝐼) → 𝐼 = 1) | |
| 6 | 4, 5 | breqtrd 5126 | . . . . . . 7 ⊢ ((((𝐼 = 1 ∧ 𝑖 ∈ 𝐷) ∧ ¬ 𝑖 = 1) ∧ 𝑖 ≤ 𝐼) → 𝑖 ≤ 1) |
| 7 | simpllr 776 | . . . . . . . . 9 ⊢ ((((𝐼 = 1 ∧ 𝑖 ∈ 𝐷) ∧ ¬ 𝑖 = 1) ∧ 𝑖 ≤ 𝐼) → 𝑖 ∈ 𝐷) | |
| 8 | psgnfzto1st.d | . . . . . . . . 9 ⊢ 𝐷 = (1...𝑁) | |
| 9 | 7, 8 | eleqtrdi 2847 | . . . . . . . 8 ⊢ ((((𝐼 = 1 ∧ 𝑖 ∈ 𝐷) ∧ ¬ 𝑖 = 1) ∧ 𝑖 ≤ 𝐼) → 𝑖 ∈ (1...𝑁)) |
| 10 | elfzle1 13457 | . . . . . . . 8 ⊢ (𝑖 ∈ (1...𝑁) → 1 ≤ 𝑖) | |
| 11 | 9, 10 | syl 17 | . . . . . . 7 ⊢ ((((𝐼 = 1 ∧ 𝑖 ∈ 𝐷) ∧ ¬ 𝑖 = 1) ∧ 𝑖 ≤ 𝐼) → 1 ≤ 𝑖) |
| 12 | fz1ssnn 13485 | . . . . . . . . . 10 ⊢ (1...𝑁) ⊆ ℕ | |
| 13 | 12, 9 | sselid 3933 | . . . . . . . . 9 ⊢ ((((𝐼 = 1 ∧ 𝑖 ∈ 𝐷) ∧ ¬ 𝑖 = 1) ∧ 𝑖 ≤ 𝐼) → 𝑖 ∈ ℕ) |
| 14 | 13 | nnred 12174 | . . . . . . . 8 ⊢ ((((𝐼 = 1 ∧ 𝑖 ∈ 𝐷) ∧ ¬ 𝑖 = 1) ∧ 𝑖 ≤ 𝐼) → 𝑖 ∈ ℝ) |
| 15 | 1red 11147 | . . . . . . . 8 ⊢ ((((𝐼 = 1 ∧ 𝑖 ∈ 𝐷) ∧ ¬ 𝑖 = 1) ∧ 𝑖 ≤ 𝐼) → 1 ∈ ℝ) | |
| 16 | 14, 15 | letri3d 11289 | . . . . . . 7 ⊢ ((((𝐼 = 1 ∧ 𝑖 ∈ 𝐷) ∧ ¬ 𝑖 = 1) ∧ 𝑖 ≤ 𝐼) → (𝑖 = 1 ↔ (𝑖 ≤ 1 ∧ 1 ≤ 𝑖))) |
| 17 | 6, 11, 16 | mpbir2and 714 | . . . . . 6 ⊢ ((((𝐼 = 1 ∧ 𝑖 ∈ 𝐷) ∧ ¬ 𝑖 = 1) ∧ 𝑖 ≤ 𝐼) → 𝑖 = 1) |
| 18 | simplr 769 | . . . . . 6 ⊢ ((((𝐼 = 1 ∧ 𝑖 ∈ 𝐷) ∧ ¬ 𝑖 = 1) ∧ 𝑖 ≤ 𝐼) → ¬ 𝑖 = 1) | |
| 19 | 17, 18 | pm2.21dd 195 | . . . . 5 ⊢ ((((𝐼 = 1 ∧ 𝑖 ∈ 𝐷) ∧ ¬ 𝑖 = 1) ∧ 𝑖 ≤ 𝐼) → (𝑖 − 1) = 𝑖) |
| 20 | eqidd 2738 | . . . . 5 ⊢ ((((𝐼 = 1 ∧ 𝑖 ∈ 𝐷) ∧ ¬ 𝑖 = 1) ∧ ¬ 𝑖 ≤ 𝐼) → 𝑖 = 𝑖) | |
| 21 | 19, 20 | ifeqda 4518 | . . . 4 ⊢ (((𝐼 = 1 ∧ 𝑖 ∈ 𝐷) ∧ ¬ 𝑖 = 1) → if(𝑖 ≤ 𝐼, (𝑖 − 1), 𝑖) = 𝑖) |
| 22 | 3, 21 | ifeqda 4518 | . . 3 ⊢ ((𝐼 = 1 ∧ 𝑖 ∈ 𝐷) → if(𝑖 = 1, 𝐼, if(𝑖 ≤ 𝐼, (𝑖 − 1), 𝑖)) = 𝑖) |
| 23 | 22 | mpteq2dva 5193 | . 2 ⊢ (𝐼 = 1 → (𝑖 ∈ 𝐷 ↦ if(𝑖 = 1, 𝐼, if(𝑖 ≤ 𝐼, (𝑖 − 1), 𝑖))) = (𝑖 ∈ 𝐷 ↦ 𝑖)) |
| 24 | psgnfzto1st.p | . 2 ⊢ 𝑃 = (𝑖 ∈ 𝐷 ↦ if(𝑖 = 1, 𝐼, if(𝑖 ≤ 𝐼, (𝑖 − 1), 𝑖))) | |
| 25 | mptresid 6020 | . 2 ⊢ ( I ↾ 𝐷) = (𝑖 ∈ 𝐷 ↦ 𝑖) | |
| 26 | 23, 24, 25 | 3eqtr4g 2797 | 1 ⊢ (𝐼 = 1 → 𝑃 = ( I ↾ 𝐷)) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ∧ wa 395 = wceq 1542 ∈ wcel 2114 ifcif 4481 class class class wbr 5100 ↦ cmpt 5181 I cid 5528 ↾ cres 5636 (class class class)co 7370 1c1 11041 ≤ cle 11181 − cmin 11378 ℕcn 12159 ...cfz 13437 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5245 ax-nul 5255 ax-pow 5314 ax-pr 5381 ax-un 7692 ax-cnex 11096 ax-resscn 11097 ax-1cn 11098 ax-icn 11099 ax-addcl 11100 ax-addrcl 11101 ax-mulcl 11102 ax-mulrcl 11103 ax-mulcom 11104 ax-addass 11105 ax-mulass 11106 ax-distr 11107 ax-i2m1 11108 ax-1ne0 11109 ax-1rid 11110 ax-rnegex 11111 ax-rrecex 11112 ax-cnre 11113 ax-pre-lttri 11114 ax-pre-lttrn 11115 ax-pre-ltadd 11116 ax-pre-mulgt0 11117 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3063 df-reu 3353 df-rab 3402 df-v 3444 df-sbc 3743 df-csb 3852 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-pss 3923 df-nul 4288 df-if 4482 df-pw 4558 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-iun 4950 df-br 5101 df-opab 5163 df-mpt 5182 df-tr 5208 df-id 5529 df-eprel 5534 df-po 5542 df-so 5543 df-fr 5587 df-we 5589 df-xp 5640 df-rel 5641 df-cnv 5642 df-co 5643 df-dm 5644 df-rn 5645 df-res 5646 df-ima 5647 df-pred 6269 df-ord 6330 df-on 6331 df-lim 6332 df-suc 6333 df-iota 6458 df-fun 6504 df-fn 6505 df-f 6506 df-f1 6507 df-fo 6508 df-f1o 6509 df-fv 6510 df-riota 7327 df-ov 7373 df-oprab 7374 df-mpo 7375 df-om 7821 df-1st 7945 df-2nd 7946 df-frecs 8235 df-wrecs 8266 df-recs 8315 df-rdg 8353 df-er 8647 df-en 8898 df-dom 8899 df-sdom 8900 df-pnf 11182 df-mnf 11183 df-xr 11184 df-ltxr 11185 df-le 11186 df-sub 11380 df-neg 11381 df-nn 12160 df-z 12503 df-uz 12766 df-fz 13438 |
| This theorem is referenced by: fzto1st 33203 psgnfzto1st 33205 |
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